734 research outputs found
Entrepreneurial Risk and Strategic Decision Making: It’s a Matter of Perspective
No full textRisk taking has long been a central theme of the entrepreneurship literature. However, research on the risk propensity of entrepreneurs has met with virtually no empirical support even though entrepreneurs consistently engage in risky events. This article attempts to resolve this paradox by examining entrepreneurial risk through the lens of cognitive psychology and decision making. The author proposes that entrepreneurial risk may be explained by recognizing that entrepreneurs use biases and heuristics more, which is likely to lead them to perceive less risk in a given decision situation. The data indicate that entrepreneurs do indeed use representativeness more in their decision making and are more overconfident than managers in large organizations. These findings provide a new perspective for understanding how entrepreneurs deal with the inordinate amount of risk associated with starting new ventures.Yeshttps://us.sagepub.com/en-us/nam/manuscript-submission-guideline
The domain of entrepreneurship research : some suggestions
No full textThere is progress in entrepreneurship research. Important works in entrepreneurship increasingly appear in highly respected, mainstream journals (see Busenitz et al., forthcoming; Davidsson, Low, & Wright, 2001). There is conceptual development that attracts attention (e.g. Shane & Venkataraman, 2000) and handbooks are compiled, providing the field with more of a common body of knowledge (Acs & Audretsch, 2003a; Westhead & Wright, 2000; Shane, 2000a). Further, there is evidence of methodological improvements (Chandler & Lyon, 2001) and accumulation of meaningful findings on various levels of analysis (Davidsson & Wiklund, 2001). Moreover, due to time lags in publication the reported improvements are likely to be underestimated. This author’s experience as organizer, reviewer and participant in core entrepreneurship conferences on both sides of the Atlantic (e.g., Babson; RENT) suggests that much of the lower end of the quality distribution has either disappeared from the submissions or is screened out in the review process. Much more than used to be the case a few years back we find among the presented papers research that is truly theory-driven; research on the earliest stages of business development, and research that employs methods suitable for causal inference, i.e., experiments and longitudinal designs
A MEASUREMENT OF ELASTIC J/PSI PHOTOPRODUCTION CROSS-SECTION AT FERMILAB-E687
No full textMeasurements of elastic photoproduction cross sections for the J/psi meson from 100 GeV to 375 GeV are presented. The results indicate that the cross section increases slowly in this range. The shape of the energy dependence agrees well with the photon-gluon fusion model prediction
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Annual report for the High Energy Physics Program at The University of Alabama
No full textThe High Energy Physics group at University of Alabama is a member of the L3 collaboration studying e{sup +}e{sup {minus}} collisions near the Z{degree} pole at the LEP accelerator at CERN. About 2 million Z{degree} events have been accumulated and the experiment has been prolific in publishing results on the Z resonance parameters, the Z couplings to all leptons and quarks with mass less than half the Z mass, searches for new particles and interactions, and studies of strong interactions and/or weak charged current decays of quarks and leptons abundantly produced in Z decays. They are contributing to data analysis as well as to detector hardware. In particular, they are involved in a major hardware upgrade for the experiment, namely the design, construction and commissioning of a Silicon Microvertex Detector (SMD) which has successfully been installed for operation during the present grant period. A report is presented on their recent L3 activities and their plans for the next grant period of twelve months (April 1, 1994--March 31, 1995). Their main interests in data analysis are in the study of single photon final states and the physics made more accessible by the SMD, such as heavy flavor physics. Their hardware efforts continue to be concentrated on the high precision capacitive and optical alignment monitoring systems for the SMD and also includes gas monitoring for the muon system. They are also planning to participate in the coming upgrade of the L3 detector
A wire source deployment system for calibration of the double chooz near detector
No full textElectronic Thesis or DissertationThe reactor neutrino experiment, Double Chooz (DC), observes the electron antineutrino flux from two nuclear reactors located in Chooz, France. Its primary purpose is to measure the neutrino oscillation parameter sin2 2θ13 via inverse beta decay within two functionally identical detectors which utilise a gadolinium doped liquid scintillator active target region. This thesis presents a complete description of the design, construction and installation of the DC near detector radioactive source deployment guide tube (GT) system. During the installation process a photographic and theodolite survey were conducted to determine the precise location of the GT within the detector. Data from both surveys were analysed and compared to obtain a set of coordinates useful for calibration purposes. Post installation, a system verification test was performed to determine the function of the GT. After the first year of successful physics data acquisition using the near detector a calibration campaign was conducted. It was the first time both detectors were calibrated using the GT system. One of several main calibration systems, the GT provides the required accuracy to aid oscillation analyses through the precise knowledge of the energy response and neutron detection efficiency within both detectors. This aids in the minimisation of systematic uncertainties between both detectors
Search for neutrinoless double-beta decay and 42Ar in enriched xenon using the EXO-200 dataset
No full textElectronic Thesis or DissertationObservation of neutrinoless double-beta decay (0νββ) would constitute discovery of a new class of particle (the Majorana neutrino), violate lepton number conservation, and provide a constraint on the neutrino mass scale. The Enriched Xenon Observatory experiment (EXO-200) operated an extremely radio-pure tracking calorimeter filled with liquid xenon enriched in the candidate isotope 136Xe and installed underground in New Mexico, USA. The author presents a search for 0νββ with the complete EXO-200 dataset, the second-largest exposure of any 0νββ experiment (234.1 kg∙yr). The analysis applied coupled fits to event energy and position with a classical topological discriminator. The author produced an expanded background model to search for radioactive 42Ar via its β-decay product, 42K. No signal excess was observed near the 0νββ Q-value, leading to a limit on the 0νββ half-life in 136Xe of T_(1/2)^0ν >3.0×10^25 yr and Majorana neutrino mass 〈m_ββ 〉<(100-309) meV, both reported at the 90% confidence level (CL). The corresponding sensitivity of 4.2×10^25 yr (90% CL) represents an improvement of 5.7% over the standard EXO-200 background model, which does not include 42Ar. Notably, the author's expanded model has been used to publish the first constraint on the content of 42Ar in enriched xenon, which provides important input to the design of future low-background experiments. A limit is set on the specific activity of 42Ar in enriched xenon at <0.8 μBq/kg (90% CL). Additionally, the author’s improvements to offline event reconstruction techniques, operational responsibility for the EXO-200 scintillation panel detectors, and principal contributions to a published paper on cosmogenic backgrounds are also discussed
I think therefore I learn? Entrepreneurial cognition, learning and knowing in practice
No full textIn observing recent theoretical developments in the field, it is apparent that two distinctive yet relatively separate areas of study have emerged—entrepreneurial cognition and entrepreneurial learning. This conceptual paper aims to create some measure of reconciliation between these two perspectives to provide a more robust and multidisciplinary conceptual platform for understanding the entrepreneur. We augment an appreciation of the social dimensions of the learning process by which entrepreneurs cognitively acquire and transform knowledge. Through the application of influential practice-based theorizing we offer an integrative organizing framework that places participation at the heart of entrepreneurial practice, knowledge and identity
Mike Wright, Harry J. Sapienza, Lowell W. Busenitz (Szerk.): Venture Capital I-III (Kockázati tőke) Edward Elgar, 2003.
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